Electric motor



W. R. RAY.

ELECTRIC MOTOR. l

APPLICATmN HLED ocT. 22, 1919. nENEwEn JAN. 18,1922.

1 ,427,4 1 Patented Augr 29, 1922.

3 SHEETS-SHEET I- INVESTOR WML/I7 Hr AT'ro RN nys ELECTRIC MOTOR.

APPucATloN FILED 0cT.22,1919. RENEWED JAN. 18,1922.

l ,427,4 1 6` Y Patented Aug. 29, 1922.-

3 SHEETS-SHEET 2- W. R. RAY.

l ELECTRIC MOTOR. APPLICATION FILED OCT. 22,1919. RENEWED JAN. 18,1922- Patented Aug. 29, 1.922.

3 SHEETS-SHEET 3.

FIG'. j.

INVENTOR W/LL//Z/R/VK A'rroRNlYs UNITED STATES PATENT` OFFICE.

WIILIAI RUTH RAY, or SAN rnnncx'sco, CALIFORNIA.

ELECTRIC M01-01%.

' Speci-cation of Letters Patent.

' Patented Aug. 29, 1922.

Original application led September 25, 1916, Serial No. 122,014. Divided and this application lled cto -ber 22,N 1919, Serial INo. 332,395. Renewed January 18, 1922. Serial No. 530,229.

To all whom, z't` my concern.

Be it known that I WILLIAM R. RAY, a citizen of the United tates, residing at the city and county ofSan Francisco and State of California, have `invented new and useful Improvements in Electric Motors, of which the following is a specification.

This invention is a vdivision of my co- A pending application entitled Oil burner,

filed .September 25, 1916, Serial No. 122,014, patented Mar. 29, 1921, No. 1,373,149, and relates to an electric motor and means for mounting and coolingV the same.

One of the objects of the present invention is to provide an electric motor of novel construction and particularly to provide means for cooling the same.

Another object of the invention is to provide a split motor housing to permit ready removal or insertion of the field coil ring and to permit the ring to be substantially secured when in place.

Another object of the inventionis to provide amounting for the motor housing and a bearing therein for the reception of the motor shaft .and the armature supported thereby.

Further objects will hereinafter appear.

' Theinvention consists of the parts and the construction, combination and arrangement of parts as hereinafter more fully described and claimed, having reference to the accompanying drawings, in which- Fig. 1 is a central vertical longitudinal section through the motor and the bearing supporting the same, said section also showing a centrifugal atomizing burner and means for supplying air thereto.

Fig. 2 is a front view of the motor.

Fig. 3 isa cross section of the motor housing taken on line 3 3, Fig. 1.

eferring to the drawings in detail, Al indicates the front end of an ordinary furnace and 2, the opening which is generally closed by the furnace door. Suitably secured to the furnace front is a plate 3 provided witha conical extension 4 which projects into ythe-opening 2 to form a metallic lining for the same. Formed integral .with the plate 3 or otherwise secured to the same is a pair of hinge lugs 5 which are provided for the purpose of supportinlg a fan casing generally indicated at B.- his casing consists of a housing 6 and a front cover 7 secured thereto by means of screws 8. Formed integral with the housing 6 is a pair of hinge lugs 9 which cooperate with the lugs 5 to form a hinge about which the fan vcasing as a whole may be swung.

Secured to the cover 7 by means of screws 10 is a bearing extension `11 yand secured to the outer end of said extension by means of screws 12 is an electric motor C which forms the subject matter of the present application.

This motor is provided with a hollow shaft 13 which 'extends through the bearing extension 11, being supported therein by means of ball bearings 14 and 15, the outer end of .the shaft being extended as shown, to provide a support for a fan 16 'and an atomizing cup 17. The cover section 7 is provided with an air intake opening 18, to which air' is admitted through perforations 19 formed insan enlarged portion 20 of the f bearing extension. The housing proper is provided with a discharge opening 21 which is extended by securing to the housing a tapered nozzle 22. This nozzle is suiiiciently long to enclose the atomizing cup 17 and forms in conjunction therewith an annular discharge passage for the air discharging from the fan.

delivered to the valve 28 and the connected stationary pipe 27 by means of a pump 29 of suitable construction, which is supported.

with relation to the bearing extension 11 by means of a bracket 30 and directly driven from the motorshaft at a reduced speed by means of the worm gear drive generally indicated at 31. l

The features to be covered by the present application are the mounting and construction of the motor housing. Referring to Figs. 1, 2 and 3 it will be seen that the housing on the motor consists of afsingle castin 32 which is secured to the bearing extension 11 by means of screws 12. The casing is provided with a jacket or annular channel 32 which, practically speaking,

' ner:l Extending through the hinge surrounds the whole` casing. The case, how; ever, is split at the lower end, as at 33, for

purposes hereinafter to be described and.y

thereforeneceitates a division in the channel or jacket 32, such as shown. The annular channel is in this instance rovided for the purpose of permitting' the clrculation of oil; first, to cool the motor, and secondly, to

. heat the oil to be atomized. The oil is del livered and circulated in the following source of sglpply enters the lower half of charged.

Vpaes down` throng the double throu h a pipe 37 and then which is connected with. a motor casin jacket or channel 32* at the pointl indicate at 38, by means of a pipe 39. The oil then passes around the housing through the jacketV in the direction of arrow a and thenenters the suction side of the pump 29 through a pipe 40 The major part of the oil disby the pump is here directed throu h a pipe 4:1 to the valve 28 with con--v necte stationary pipe 27 which finally delivers the oil to the atomizing cup 17. Any surplus amount of oil delivered bythe pump is by-plaed' throu h a pipe 42 connected with t euper ho ow pintle 345, which, as before state ,l connects with the upper side of the double T indicated at 36. It then passes through a pipe 43 which connects with the source of supply, thereby permitting a return or overflow action for any su lus amount of oil delivered bythe pump.

rom this it can be seen that means are provided for circulating a cooling medium through a jacket surrounding the motor housing, this circulation being of vgreat importance, particularly when the motor` is used in conjunction with oil burners as it provides means for cooling the motor and for raising the oil to a temperature where it is more readily atomized when delivered to the burner.

Another important feature of the present invention is the Asplitting of the. motor housing at the int indicated at 33'. This per'l mits the field) ring ofthe Ivmotor t'o be easily removed for` replair and similarly permits e acceto t e inner bearing 14. The split portion of the casing is extended by a pair' of lugs 33l which are perforated to receive screws 33". The screws, when looscned, permit suicient expansion of the housing to releasel the field ringwhile tightening ofthe screwsv will securely lock the same. against removal.

Another important feature of the vinvention istheprovision of the'bearing member 11*1 this bearing serving two functions; first, that of supporting the motor housing by the hollow pintle 34- means of the screws 12, and secondly, that of supporting the motor shaft andthe armature supported thereby. This onstruction eliminates bearing projections on opposite sidesof the motor houslng and thereby permits a nouer/compact construction and a simple assemblyl The passage of oil through the motorA jacket previous to its delivery to the cup is of great benefit as it permits the heat of the motor to be conducted to the oil, in this manner rendering it -more suitable for atomization and simultaneously reducing the motor temperature to such an extent that t;.,n1ay run for hours and ldays at a time without any d-anger of burning or overheatin The temperature of the motor rogiar an tlie oil passed therethrough may ermore be regulated to a great extent by permitting a ater or lesser volume of `o1l to cmstantly ischarge through the overfiow provided by the pipes. 42', '43 and 35. The mounting of the motor, by securing it to the bearing extension 1 1 here shown2 is of further importance as it entirely eliminates bearings Withinl the motor or supporting brackets and other devices heretofore generally used. It also permits the employment of an entirely lenclosed motor and in this manner prevents the admission of dust and g1'While the motor here shown is employed in conjunction with an oil burner of the centrifugal type, "I wish it understood that it may be emplo, ed for any purpose desired; similarly, t at the materials and finish of the several parts employedk may be such as the experience and judgment of the manufacturer may dictate.

Havin "thus described my invention, what I c aim and desire to secure by Letters Patent is-- 1. In an lelectric motor, a housing, said housing 'beingplitto permit contraction and expansion of the same,` bolts assing through the housing adjacent the sp it portin to permit contractionand expansion of the housing, a field ring within the housing adapted to be secured by the contraction of the housing, a jacket-formed exterior of the housing terminating at the split portion ofthe housing, and a.` pair of ipes connected with the jacket terminating-- points to permit circulation ofI a cooling medium throulgh the jacket. c Y v .2. n a motor of thev character described, an enclosing housing, having an annular surroundin channel to carry a cooling medium, said ousing being separated at one side, and having means to contract or expand it a p ump pipes connecting the ump with eabh side of the separation to al ow a cooling medium to be circulated around the l shaft, saiid shaft'being hollow.I and containpipe, and bypass xneans to return surplus ing a conducting pi e. cooling medlum to the supply source.

3. A motor includlng aleld and an inter'- In testimony whereof I have hereunto set nal revoluble armature, an inclosing split my hand'in the presence of tvyo subscribing 5 housing jacket, means to introduce a coohng wltnesses.

medium into one side of the 'acketand ds' charge it from the other slde, a hollow WILLIAM RUTH RAY' armature shaft and a pipe extending there- Witnesses: through, means by Whlch the discharge JOHN H. HERRING,

10 from the motorjacket s conducted to sald W. W. HEALEY. 

